Is there a frictional measurement that can be made on an oil against an oil or against a metal to determine how *slick* it is? Or is this just a matter of how thick it is, i.e. thicker = slicker since it doesnt squish out? But then people say thicker = more friction? Im a little confused, Im also doing organic chemistry homework right now and thats probably why, but it just popped in my head (since I'd rather think about oil than homework) and so Im asking.